Question about 1983 Chevrolet C2500
Lately, my transmission stop shifting into third gear, and if does, it would shift back down to second gear.
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Posted on Jan 02, 2017
SOURCE: I have a 1978 chevy
On the back right side of the tranny you will find the modulator valve with a vaccum line. First check the the line is ok, if so, replace the valve. Note; there is an adjusting screw inside the vaccum hose fitting to change the shift modes. Don't mess with it unless necessary! Frankster016
Posted on Dec 02, 2008
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